PromptFold

What it does

Compress your AI prompts to reduce token usage by 30-50% without losing any message information. Completely free during launch period - no cost at all. Tuned for support and task-oriented chatbot use cases.

Compress your AI prompts to reduce token usage by 30-50% while maintaining perfect semantic equivalence. Completely free during launch period - no cost at all.

PromptFold is prompt compression API for LLMs that is real-time, lossless and low latency. It dynamically reduces input token usage while preserving meaning and intent, and automatically optimizes prompts to reduce unnecessary output token count. PromptFold is fine-tuned for conversational LLM applications like support bots, task assistants, and interactive AI agents. Evaluated on thousands of real dialogues from industry-standard datasets—actual customer service and task-oriented conversations, tested end-to-end via our production API. MultiWOZ is a 10k-dialogue, multi-domain task-oriented dataset collected by University of Cambridge researchers, covering domains like hotels, restaurants,…from promptfold.web.app

• 
  Prompt Whisperer2024 · chatwhisperer.ai · ▲352

  Simplifying your path to AI interaction

• 
  SuperCompressJul 2026 · supercompress.dev · ▲16

  Cut your LLM Token Costs by 65%

• 
  TokenTrimSep 2026 · chromewebstore.google.com · ▲10

  Trim your AI prompts. Same answer, 40% fewer tokens.

• CG
  Compress GPT-4 Prompts2023 · promptreducer.com · ▲68

  Hey HN! I recently built Prompt Reducer, an app that makes it easier to compress GPT-4 prompts. The main goal is to reduce the number of tokens in each prompt, thereby reducing the cost of running GPT-4. I figured since @gfodor tweeted about compressing GPT-4. It’s still early, and it does not work perfectly, but I’d love to hear any feedback or suggestions for how to make it faster or more efficient.

• 
  Promptr for AIApr 2026 · promptr.ai · ▲32

  The context manager and skills library for marketing teams

• 
  Prompt Optimizer2025 · mindpal.space · ▲17

  Free AI Prompt Optimizer - Improve Your AI Prompts Instantly. Supports ChatGPT, Claude, and all major AI models.

• 
  Spira Maxima▲578

  Video model that turns script into viral social media videos

  AI · 17d ago · spira.ai

• 
  Rill Browser▲540

  The browser where Claude Code and Codex work beside you

  AI · 17d ago · rill.love

• 
  Germany's new sovereign AI model Kolibri▲424

  Kolibri is Aleph Alpha

  AI · 19d ago · tej.as

• 
  Giving Opus 5.5 a simulated paint canvas▲392

  Paintings by AI models: programs run through a simulation of oil paint.

  AI · 21d ago · stillwet.art

• 
  PixVerse R2▲381

  A real-time world model you can explore and change

  AI · 29d ago · world.pixverse.video

• 
  Hemory▲381

  Keep listening. Searchable memory for your AI agents.

  AI · 30d ago · hemory.com

• 
  Trace▲1,555

  Workflow Automations for the Human 👾 AI Workforce

  AI · 2025 · trace.so

• 
  I spent 6 years building a ridiculous wooden pixel display▲1,145

  I built the world's most impractical 1000-pixel display and anyone in the world can draw on it. It draws a single pixel at a time and takes 30-60 minutes to complete a single image. Anyone can participate in the project by voting for the next image to be drawn, and submitting images. https://kilopx.com/

  Work · 2025 · benholmen.com

• 
  Indy AI by Contra▲1,070

  Job boards are dead. Your network is alive

  AI · 2025 · contra.com

• 
  Kitten TTS – 25MB CPU-Only, Open-Source TTS Model▲1,003

  Kitten TTS is an open-source series of tiny and expressive text-to-speech models for on-device applications. We are excited to launch a preview of our smallest model, which is less than 25 MB. This model has 15M parameters. This release supports English text-to-speech applications in eight voices: four male and four female. The model is quantized to int8 + fp16, and it uses onnx for runtime. The model is designed to run literally anywhere eg. raspberry pi, low-end smartphones, wearables, browsers etc. No GPU required! We're releasing this to give early users a sense of the latency and voices…

  AI · 2025 · github.com

• 
  I was curious about spherical helix, ended up making this visualization▲865

  I was wondering how I can arrange objects along a spherical helix path, and read some articles on it. I ended up learning about parametric equations again, and make this visualization to document what I learned: https://visualrambling.space/moving-objects-in-3d/ feel free to visit and let me know what you think!

  Life & fun · 2025 · visualrambling.space

• 
  The current sky at your approximate location, as a CSS gradient▲788

  For HTML Day 2025 [1], I made a web service that displays the current sky at your approximate location as a CSS gradient. Colours are simulated on-demand using atmospheric absorption and scattering coefficients. Updates every minute, without the use of client-side JavaScript. Source code and additional information is available on GitHub: https://github.com/dnlzro/horizon [1] https://html.energy/html-day/2025/index.html

  Dev tools · 2025 · sky.dlazaro.ca